Abstract - load double-layer report culture multi-link elastic transmission method and system

Abstract

The application discloses a kind of abstract-load double-layer news culture multi-link elastic transmission method.The method comprises the following steps: collecting power transmission engineering original instant data, and determining current engineering scene label;The original instant data is abstracted as business object portrait;Abstract message and load fragment are generated;Collect the real-time state of candidate link in each link pool;Determine the priority delivery level that corresponding business object abstract message needs to guarantee;At the same time, set state switching and elastic transmission model, for guaranteeing abstract message continuous conveyable, then according to link state, load fragment is executed degradation, switching, aggregation and recovery compensation;The receiving end executes abstract analysis, load reorganization, missing block detection and compensation triggering.The application improves the transmission certainty, business continuity and result closed loop capability of power transmission engineering instant data in complex environment.

Description

Technical Field

[0001] This invention relates to the field of communication assurance and data transmission technology for power transmission and transformation projects, specifically to a method and system for multi-link resilient transmission of abstract-load dual-layer messages. Background Technology

[0002] Power transmission and transformation projects continuously generate a large amount of real-time data with significant differences in timeliness, volume, and completeness during the surveying and design, construction supervision, operation and maintenance, and emergency response processes. For example, in the surveying and design phase, UAV aerial surveys, laser point clouds, and orthophotos often produce data ranging from hundreds to thousands of megabits per second. The construction supervision phase simultaneously generates second-level alarms, keyframe images, partial video clips, and equipment status data. The operation and maintenance phase includes identification results of towers, corridors, and disaster sites, as well as raw inspection data that needs to be transmitted back at opportune times. The emergency response phase simultaneously generates dispatch instructions, disaster location information, on-site situation images, and phased progress reports. The requirements for this data differ across three dimensions: whether it must be delivered immediately, whether degraded transmission is permitted, and whether complete retransmission is required afterward.

[0003] Current engineering practices typically organize transmission strategies around the link itself. Common practices include switching between public networks, satellite links, or local ad hoc networks simply based on link quality (dual-link or multi-link switching techniques), or caching and sending the raw video stream and raw files as a whole. These approaches work when link conditions are good, but in complex environments such as high-altitude mountains, canyons, and deserts, the following technical problems arise if the broadband link is interrupted or degraded: First, critical small data and large-volume loads compete for the same channel, causing alarms, locations, risk levels and scheduling summaries that really need to be delivered first to be delayed. Second, if a large file or long video cannot be sent completely, under a narrow-band backup link, it can only be simply downgraded to "cannot be transmitted" or "wait for recovery before being sent in its entirety", and the most valuable and essential information cannot be sent first; Third, satellite internet, satellite IoT / BeiDou short message service, and drone relay or Mesh self-organizing network are often used separately, lacking a unified integrated mechanism for summary priority, payload flexibility, recovery and retransmission, and state switching. Fourth, it typically does not provide criteria for fragment selection and retransmission based on business objects. This results in only being able to resume the original file transmission after the link is restored, and it is impossible to perform orderly completion based on the priority and integrity bitmap. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a digest-load dual-layer message multi-link elastic transmission method and system. This method enables key digest information to be delivered preferentially when the backup link is available, allows complete payloads to be transmitted elastically when broadband links and local links are available, and automatically retransmits missing payloads after the links are restored. This improves the determinism, service continuity, and result closure capability of real-time data transmission in power transmission and transformation projects under complex environments.

[0005] To achieve the above objectives, the present invention provides a digest-payload dual-layer message multi-link resilient transmission method, which is characterized by including the following steps: S1) Collect raw, real-time data of the power transmission and transformation project and determine the current project scenario label; S2) Abstract the raw real-time data into business object profiles; S3) For the same business object profile, generate a summary message and one or more payload fragments; the summary message carries at least a minimum survival information set, and the payload fragment carries each block of the complete payload set; at the same time, establish a unified object identifier, version identifier, fragment sequence number and integrity bitmap association between the summary message and each payload fragment; S4) Establish multiple link pools and collect the real-time status of candidate links in each link pool; the link pool includes at least a broadband link pool, a local link pool, and a backup link pool. S5) Determine the urgency of business objects based on the engineering scenario template and business object profile, and then determine the priority delivery level that the corresponding business object summary message needs to be guaranteed based on the value of the business object urgency; at the same time, calculate the summary link score and the payload link score respectively, and set the state switching and elastic transmission model. The state switching and elastic transmission model is used to ensure that the summary message can be continuously delivered. Then, according to the link status, the payload fragments are degraded, switched, aggregated and restored for retransmission. S6) The receiving end performs digest parsing, payload reassembly, missing block detection, and retransmission triggering based on the object identifier, version identifier, and integrity bitmap.

[0006] Furthermore, in S1), the engineering scenario tags include at least the tags for surveying and design, construction supervision, operation and maintenance inspection, and emergency rescue.

[0007] Furthermore, in S2), each business object profile includes at least the object identifier, engineering scenario label, event type, spatial location, time window, minimum survival information set, complete load set, integrity constraint, reconfigurability coefficient, confidentiality level, and engineering impact level.

[0008] Furthermore, in S3), the minimum survival information set includes at least one or more of the following: object identifier, engineering scene label, timestamp, spatial coordinates, event category, risk level, latest delivery time, confirmation method, and low-dimensional summary information for rapid perception. The complete payload set includes a preview block, a key interest area block, a full data block, and a retransmission block.

[0009] Furthermore, in S5), the urgency of the business object is calculated using the following formula. In the formula, Indicates the urgency of the business object. This represents the normalized value of the remaining time window of a business object. Indicates the level of impact of the project. Indicates the level of confidentiality. Represents the reconfigurability coefficient. Represents the integrity constraint coefficient. These represent the weighting coefficients, .

[0010] Furthermore, in S5), the summary link score is calculated using the following formula. In the formula, Indicates link For business objects Abstract link score, Indicates link The current one-way delay, Represents business object The maximum allowable delay for the digest message, Indicates the packet loss rate of the link. This indicates confirmation of reachability indicators. Indicators of environmental adaptability Indicates link survivability metrics. These represent the weighting coefficients, ; The load link score is calculated using the following formula. In the formula, Indicates link For business objects The load link score, Indicates link The effective bandwidth, Represents business object The expected bandwidth of the load, Indicates link stability. This represents the normalized value of the link cost. Indicates the degree of friendliness in the restructuring. These represent the weighting coefficients, .

[0011] Furthermore, in S5), the state switching and elastic transmission model includes a state switching structure and an elastic transmission structure; The state switching structure includes setting a main link degradation threshold Th1, a backup link activation threshold Th2, and a back-cut hysteresis time Th3. Based on the relationship between the summary link score and the threshold, state switching is performed between normal transmission state, local degradation state, backup transmission state, and recovery and retransmission state. The resilient transmission structure includes sending summary messages and full or preview payloads when the broadband link is available; when the broadband link degrades, continuing to send summary messages and sending payload fragments in a degraded manner according to the order of preview blocks, interest blocks, and full blocks; when both broadband and local links are unavailable, sending only the minimum survival information such as summary messages, alarms, location, and instructions through the backup link, and caching the complete payload locally, to be retransmitted according to the integrity bitmap after the link is restored; and when the broadband and local links are restored, restoring the missing payload fragments in an orderly manner according to the integrity bitmap and the priority of retransmitting the missing fragments.

[0012] Furthermore, in S5), the state switching strategy includes: when the summary link score is lower than... When the summary link score of all broadband links and local links is lower than a certain value, it enters a local degradation state; When the broadband link recovers and remains stable for more than [time period missing], it enters the backup transmission state; when the broadband link recovers and remains stable for more than [time period missing], it enters the backup transmission state. Then, it enters the recovery and retransmission state to avoid frequent switching caused by link jitter.

[0013] Further, in S5), the load fragmentation level selection criterion determines which load fragmentation can be sent to under the current link conditions, and the load fragmentation level selection criterion is expressed by the following formula. In the formula, This indicates the payload fragmentation level that can be sent under the current link conditions. Indicates the first Each load segmentation level Indicates link Effective throughput, Represents business object The remaining time window that can be sent.

[0014] Furthermore, in S5), the retransmission priority is calculated using the following formula. In the formula, Indicates the first Priority of retransmission at each payload fragmentation level Indicates the urgency of the business object. Indicates the first The semantic hierarchy of each payload fragmentation level Indicates the first The incomplete time length of each load segment level These represent the weighting coefficients.

[0015] The advantages of this invention are: 1. This invention elevates real-time data from power transmission and transformation projects from "files or video streams" to "portable, sliceable, and recoverable" business objects, improving manageability in weak network environments; 2. This invention splits the same business object into summary messages and payload fragments, and performs hierarchical scheduling, elastic switching, and recovery retransmission between multiple types of links such as satellite Internet, satellite IoT / BeiDou short message, and local ad hoc networks; by prioritizing the transmission of summary messages, the minimum necessary information such as alarms, positioning, risk levels, key instructions, and key frame indexes can still be delivered when the backup link exists; by downgrading and retransmitting payload fragments, the large volume of data is transformed from "overall transmission failure" to "summarize first, then preview, and then complete" when the link fluctuates; 3. This invention improves the matching degree between transmission decisions and service timeliness by scoring the summary link and the payload link separately; Abstract of this invention - A method and system for resilient transmission of payload dual-layer message across multiple links, directly applicable to various power transmission and transformation engineering scenarios such as surveying and design, construction supervision, operation and maintenance inspection, and emergency rescue. It enables priority delivery of key summary information when the backup link is available and resilient transmission of complete payloads when broadband links and local links are available. It also automatically retransmits missing payloads after the link is restored, ultimately improving the determinism, service continuity, and result closure capability of real-time data transmission in complex environments for power transmission and transformation projects. Attached Figure Description

[0016] Figure 1 This is a flowchart of the abstract-payload two-layer message multi-link resilient transmission method in this invention; Figure 2 This is a multi-network elastic switching state diagram in the present invention; Figure 3 This is a schematic diagram of the overall framework of the abstract-payload dual-layer message multi-link resilient transmission system in this invention. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0018] This invention discloses a multi-link elastic transmission method for abstract-load dual-layer message reporting, capable of completing graded and timely data transmission in power transmission and transformation projects in areas with weak or no public network coverage, such as plateau mountains, canyons, forest areas, and deserts. It is applicable to various power transmission and transformation project scenarios, including surveying and design, construction supervision, operation and maintenance inspection, and emergency rescue. The method includes the following steps: S1) Collect raw, real-time data of power transmission and transformation projects and determine the current project scenario label.

[0019] The engineering scenario tags include at least the tags for surveying and design, construction supervision, operation and maintenance inspection, and emergency rescue.

[0020] S2) Abstract the raw real-time data into business object profiles. Each business object profile includes at least the object identifier ID, engineering scenario label, event type, spatial location, time window, minimum survival information set, complete payload set, integrity constraint, reconfigurability coefficient, confidentiality level, and engineering impact level.

[0021] The sources of business object profiles differ across engineering scenarios: for surveying and design scenarios, the business object profiles come from survey area numbers, data collection flights, and result layers; for construction supervision scenarios, the business object profiles come from work orders, electronic fences, equipment lists, and event rules; for operation and maintenance inspection scenarios, the business object profiles come from line sections, tower numbers, hazard numbers, and inspection task sheets; and for emergency rescue and disaster relief, the business object profiles come from disaster numbers, rescue teams, instruction sheets, and on-site feedback records.

[0022] S3) For the same business object profile, generate a summary message and one or more payload fragments; the summary message carries at least a minimum survival information set, and the payload fragment carries each block of the complete payload set; at the same time, establish a unified object identifier, version identifier, fragment sequence number and integrity bitmap association between the summary message and each payload fragment.

[0023] Specifically, the minimum survival information set includes at least one or more of the following: object identifier ID, engineering scene label, timestamp, spatial coordinates, event category, risk level, latest delivery time, confirmation method, and low-dimensional summary information for rapid perception.

[0024] Specifically, each block in the complete payload set includes a preview block, a key interest region block, a full data block, and a retransmission block. For large payloads such as images, point clouds, models, and videos, preview blocks and key interest regions are constructed first, followed by the full data block, so that the most valuable parts for judgment are sent first when the link degrades.

[0025] S4) Establish multiple link pools and collect the real-time status of candidate links in each link pool; the link pool includes at least a broadband link pool, a local link pool, and a backup link pool.

[0026] The real-time status of the candidate links includes the available bandwidth, one-way latency, packet loss rate, acknowledgment reachability, stability, deployment cost, and environmental adaptability of each link.

[0027] The broadband link pool includes satellite internet, 4G / 5G public networks, or power grid private wireless networks. The local link pool includes UAV relays and wireless mesh self-organizing networks. The backup link pool includes BeiDou satellite radio determination service short message (RDSS) links or other satellite IoT short message links. Each link reports latency, effective bandwidth, packet loss rate, acknowledgment capability, stability, and environmental adaptability in a unified format.

[0028] S5) Determine the urgency of business objects based on the engineering scenario template and business object profile, and then determine the priority delivery level that the corresponding business object summary message needs to be guaranteed based on the numerical value of the business object urgency; at the same time, calculate the summary link score and the payload link score respectively, and set the state switching and elastic transmission model. The state switching and elastic transmission model is used to ensure that the summary message can be continuously delivered, and then perform degradation, switching, aggregation and recovery retransmission on the payload fragments according to the link status.

[0029] The summary message in this invention is used to ensure that the minimum necessary information "must be delivered even if only narrowband links are available", and the payload fragmentation is used for step-by-step transmission and recovery when broadband links and local links are available.

[0030] The urgency of a business object is used to characterize whether the business object currently requires priority protection, and it is calculated using the following formula. In the formula, Indicates the urgency of the business object. This represents the normalized value of the remaining time window of a business object. Indicates the level of impact of the project. Indicates the level of confidentiality. Represents the reconfigurability coefficient. Represents the integrity constraint coefficient. These represent the weighting coefficients, .

[0031] Business object urgency The larger the value, the higher the priority should be given to ensuring the timely delivery of the summary message for this business object.

[0032] The summary link score and the payload link score adopt different weighting systems. The summary link score considers at least latency adaptability, acknowledgment reachability and link survivability, while the payload link score considers at least effective bandwidth, stability and transmission cost.

[0033] The digest link score is used to measure the reachability and survivability of each link to the digest message, and it is calculated using the following formula. In the formula, Indicates link For business objects Abstract link score, Indicates link The current one-way delay, Represents business object The maximum allowable delay for the digest message, Indicates the packet loss rate of the link. This indicates confirmation of reachability indicators. Indicators of environmental adaptability Indicates link survivability metrics. These represent the weighting coefficients, .

[0034] The load link score is used to measure the link's throughput capacity for load fragmentation and retransmission cost, and it is calculated using the following formula. In the formula, Indicates link For business objects The load link score, Indicates link The effective bandwidth, Represents business object The expected bandwidth of the load, Indicates link stability. This represents the normalized value of the link cost. Indicates the degree of friendliness in the restructuring. These represent the weighting coefficients, .

[0035] Preferably, the state switching and resilient transmission model includes a state switching structure and a resilient transmission structure.

[0036] The state switching structure includes setting a main link degradation threshold Th1, a backup link activation threshold Th2, and a back-cut hysteresis time Th3. Based on the relationship between the summary link score and the threshold, state switching is performed between normal transmission state, local degradation state, backup transmission state, and recovery and retransmission state.

[0037] Specifically, the state switching strategy includes: when the summary link score is lower than... When the summary link score of all broadband links and local links is lower than a certain value, it enters a local degradation state; When the broadband link recovers and remains stable for more than [time period missing], it enters the backup transmission state; when the broadband link recovers and remains stable for more than [time period missing], it enters the backup transmission state. Then, it enters the recovery and retransmission state to avoid frequent switching caused by link jitter.

[0038] The resilient transmission structure includes sending summary messages and full or preview payloads when the broadband link is available; when the broadband link degrades, continuing to send summary messages and sending payload fragments in a degraded manner according to the order of preview blocks, interest blocks, and full blocks; when both broadband and local links are unavailable, sending only the minimum survival information such as summary messages, alarms, location, and instructions through the backup link, and caching the complete payload locally, to be retransmitted according to the integrity bitmap after the link is restored; and when the broadband and local links are restored, restoring the missing payload fragments in an orderly manner according to the integrity bitmap and the priority of retransmitting the missing fragments.

[0039] Specifically, the load fragmentation level selection criterion determines which load fragment can be sent to under the current link conditions. The load fragmentation level selection criterion is expressed by the following formula. In the formula, This indicates the payload fragmentation level that can be sent under the current link conditions. Indicates the first Each load segmentation level Indicates link Effective throughput, Represents business object The remaining time window that can be sent.

[0040] The above-mentioned load fragmentation level selection criterion means that within the remaining time window, the highest level load set that can be delivered completely is selected first; if the full block cannot be sent, it is automatically downgraded to an interest block or preview block.

[0041] Specifically, the retransmission priority is used to determine the recovery order of missing fragments after the link is restored, and it is calculated by the following formula. In the formula, Indicates the first Priority of retransmission at each payload fragmentation level Indicates the urgency of the business object. Indicates the first The semantic hierarchy of each payload fragmentation level Indicates the first The incomplete time length of each load segment level These represent the weighting coefficients.

[0042] Retransmission priority The larger the value, the higher the priority should be given to retransmitting the missing fragment.

[0043] S6) The receiving end performs digest parsing, payload reassembly, missing block detection, and retransmission triggering based on the object identifier, version identifier, and integrity bitmap.

[0044] Specifically, after receiving the summary message, the receiving end completes event archiving, location mapping, risk labeling, and handling reminders; after receiving the payload fragments, it gradually restores key evidence, local models, and full results.

[0045] In surveying and design scenarios, real-time data generated by UAVs includes 3D terrain models, digital orthophoto maps (DOM), digital elevation models (DEM), digital surface models (DSM), point clouds, and pose information. A survey area's results are treated as a single business object, with the summary message containing the survey area number, spatial extent, coarse-resolution preview image, acquisition time, result quality identifier, and coordinate reference information. The payload is segmented into coarse modules, local key blocks, and full data blocks. Pose information and the survey area summary are preferentially transmitted via a backup link or a local link, while the full model is transmitted selectively via a broadband link or a local link. Missing blocks are retransmitted once the link is restored. The receiving end first completes survey area registration and a rough preview based on the summary message, and then gradually receives the refined results.

[0046] In construction supervision scenarios, drone imagery, on-site video, recognition results, and electronic fence events are combined into multiple business objects. For high-risk events, such as personnel accidentally entering dangerous areas, crane collision risks, or abnormal equipment tilting, a summary message is generated containing the event number, location, risk level, keyframe index, duration, and handling suggestions, ensuring that the summary message is delivered along the shortest reachable path. Corresponding video clips and image evidence are split into preview blocks and full blocks, and sent selectively based on broadband link conditions. This ensures that even if the video cannot be fully transmitted, critical events will not lose their timeliness.

[0047] In operation and maintenance inspection scenarios, landslides, collapses, debris flows, signs of tower foundation instability, and external damage risks along the transmission line are each constructed as a business object. For each business object, a summary message is generated, containing the tower number, transmission line mileage, disaster type, risk level, location, time, and recommended handling level. The on-site imagery, local point cloud, 3D mesh, and change analysis results are then broken down into preview blocks, regions of interest (ROI) blocks, and full data blocks. For high-risk inspection objects, summary messages are sent concurrently via local and backup links, with ROI blocks sent before full data blocks. Once the links are restored, the full data is retransmitted to ensure that the backend sees the risk location and type first, and then obtains complete evidence.

[0048] In emergency rescue scenarios, dispatch instructions, on-site alarms, rescue location data, and key on-site images are constructed into business objects. The summary message includes the disaster number, location, time, risk level, personnel status, instruction summary, and response requirements, and is sent first via a backup link. Key images are split into thumbnail preview blocks and full image blocks. Preview blocks are sent first, and the full blocks are transmitted after network recovery. In this way, the receiving end can obtain the disaster summary, key locations, and response instructions immediately, without waiting for the entire large image to be transmitted.

[0049] In scheduling, this invention does not directly select a link for the entire raw data, but instead selects links separately for digest messages and payload fragments. Digest messages select at least one link with the best current survivability, and can use single transmission, redundant dual transmission, or guaranteed concurrent transmission depending on the urgency of the business; payload fragments select one or more elastic links based on the remaining time window, fragmentation level, reconfigurability, and link bandwidth.

[0050] The present invention also designs a digest-payload dual-layer message multi-link resilient transmission system, including a data acquisition module 1, a service object profiling module 2, a dual-layer message module 3, a link status acquisition module 4, a resilient transmission decision module 5, and a receiving and reassembly module 6.

[0051] The data acquisition module 1 is used to collect raw real-time data of the power transmission and transformation project and determine the current project scene label.

[0052] The business object profile 2 is used to abstract raw real-time data into a business object profile.

[0053] The two-layer message module 3 is used to generate summary messages and payload fragments based on the business object profile.

[0054] The link status acquisition module 4 is used to collect the real-time status of candidate links in each link pool.

[0055] The elastic transmission decision module 5 is used to determine the urgency of business objects based on the engineering scenario template and business object profile, and then determine the priority delivery level that the corresponding business object summary message needs to be guaranteed based on the value of the business object urgency. At the same time, it calculates the summary link score and the payload link score respectively, sets the state switching and elastic transmission model, which is used to ensure that the summary message can be continuously delivered, and then performs degradation, switching, aggregation and recovery retransmission on the payload fragments according to the link status.

[0056] The receiving and reassembly module 6 is used to complete the reassembly and retransmission control based on the object identifier, version identifier and integrity bitmap.

[0057] This invention does not simply increase the link score or the number of links, but rather abstracts real-time data in power transmission and transformation projects into calculable, hierarchical, and recoverable business objects. These business objects are further broken down into "guaranteed-delivery summary messages" and "elastic load fragments." Then, based on scenario policies and link status, routing, switching, degradation, recovery, and retransmission are performed on the two respectively. This ensures that critical information arrives first, important loads are replenished later, and all results are ultimately closed-loop even under conditions of weak or no public network coverage.

[0058] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for multi-link resilient transmission of abstract-payload dual-layer message, characterized in that, Includes the following steps: S1) Collect raw, real-time data of the power transmission and transformation project and determine the current project scenario label; S2) Abstract the raw real-time data into business object profiles; S3) Profile the same business object and generate a summary message and one or more payload fragments; The digest message carries at least a minimum set of survival information, and the payload fragment carries each block of the complete payload set; at the same time, a unified object identifier, version identifier, fragment sequence number, and integrity bitmap association are established between the digest message and each payload fragment; S4) Establish multiple link pools and collect the real-time status of candidate links in each link pool; the link pool includes at least a broadband link pool, a local link pool, and a backup link pool. S5) Determine the urgency of business objects based on the engineering scenario template and business object profile, and then determine the priority delivery level that the corresponding business object summary message needs to be guaranteed based on the value of the business object urgency; at the same time, calculate the summary link score and the payload link score respectively, and set the state switching and elastic transmission model. The state switching and elastic transmission model is used to ensure that the summary message can be continuously delivered. Then, according to the link status, the payload fragments are degraded, switched, aggregated and restored for retransmission. S6) The receiving end performs digest parsing, payload reassembly, missing block detection, and retransmission triggering based on the object identifier, version identifier, and integrity bitmap.

2. The abstract-payload dual-layer message multi-link resilient transmission method according to claim 1, characterized in that: In S1), the engineering scenario tags include at least the tags for surveying and design, construction supervision, operation and maintenance inspection, and emergency rescue.

3. The abstract-payload dual-layer message multi-link resilient transmission method according to claim 2, characterized in that: In S2), each business object profile includes at least the object identifier, engineering scenario label, event type, spatial location, time window, minimum survival information set, complete load set, integrity constraint, reconfigurability coefficient, confidentiality level, and engineering impact level.

4. The abstract-payload dual-layer message multi-link resilient transmission method according to claim 3, characterized in that: In S3), the minimum survival information set includes at least one or more of the following: object identifier, engineering scene label, timestamp, spatial coordinates, event category, risk level, latest delivery time, confirmation method, and low-dimensional summary information for rapid perception. The complete payload set includes a preview block, a key interest area block, a full data block, and a retransmission block.

5. The digest-payload dual-layer message multi-link resilient transmission method according to claim 1, characterized in that: In S5), the urgency of the business object is calculated using the following formula. In the formula, Indicates the urgency of the business object. This represents the normalized value of the remaining time window of a business object. Indicates the level of impact of the project. Indicates the level of confidentiality. Represents the reconfigurability coefficient. Represents the integrity constraint coefficient. These represent the weighting coefficients, .

6. The digest-payload dual-layer message multi-link resilient transmission method according to claim 5, characterized in that: In S5), the summary link score is calculated using the following formula. In the formula, Indicates link For business objects Abstract link score, Indicates link The current one-way delay, Represents business object The maximum allowable delay for the digest message. Indicates the link packet loss rate. This indicates confirmation of reachability indicators. Indicators of environmental adaptability Indicates link survivability metrics. These represent the weighting coefficients, ; The load link score is calculated using the following formula. In the formula, Indicates link For business objects The load link score, Indicates link The effective bandwidth, Represents business object The expected bandwidth of the load, Indicates link stability. This represents the normalized value of the link cost. Indicates the degree of friendliness in the restructuring. These represent the weighting coefficients, .

7. The abstract-payload dual-layer message multi-link resilient transmission method according to claim 1, characterized in that: In S5), the state switching and elastic transmission model includes a state switching structure and an elastic transmission structure; The state switching structure includes setting a main link degradation threshold Th1, a backup link activation threshold Th2, and a back-cut hysteresis time Th3. Based on the relationship between the summary link score and the threshold, state switching is performed between normal transmission state, local degradation state, backup transmission state, and recovery and retransmission state. The resilient transmission structure includes sending summary messages and full or preview payloads when the broadband link is available; when the broadband link degrades, continuing to send summary messages and sending payload fragments in a degraded manner according to the order of preview blocks, interest blocks, and full blocks; when both broadband and local links are unavailable, sending only the minimum survival information such as summary messages, alarms, location, and instructions through the backup link, and caching the complete payload locally, to be retransmitted according to the integrity bitmap after the link is restored; and when the broadband and local links are restored, restoring the missing payload fragments in an orderly manner according to the integrity bitmap and the priority of retransmitting the missing fragments.

8. The digest-payload dual-layer message multi-link resilient transmission method according to claim 7, characterized in that: In S5), the state switching strategy includes: when the summary link score is lower than... When the summary link score of all broadband links and local links is lower than a certain value, it enters a local degradation state; When the broadband link recovers and remains stable for more than [time period missing], it enters the backup transmission state; when the broadband link recovers and remains stable for more than [time period missing], it enters the backup transmission state. Then, it enters the recovery and retransmission state to avoid frequent switching caused by link jitter.

9. The abstract-payload dual-layer message multi-link resilient transmission method according to claim 7, characterized in that: In S5), the load fragmentation level selection criterion determines which load fragmentation level can be sent to under the current link conditions. The load fragmentation level selection criterion is expressed by the following formula. In the formula, This indicates the payload fragmentation level that can be sent under the current link conditions. Indicates the first Each load segmentation level Indicates link Effective throughput, Represents business object The remaining time window for sending.

10. The digest-payload dual-layer message multi-link resilient transmission method according to claim 9, characterized in that: In S5), the retransmission priority is calculated using the following formula. In the formula, Indicates the first Priority of retransmission at each payload fragmentation level Indicates the urgency of the business object. Indicates the first The semantic hierarchy of each payload fragmentation level Indicates the first The incomplete time length of each load segment level These represent the weighting coefficients.

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